The Phone in Another Room Study: What It Found and How to Use It
The best-known phone in another room study is the 2017 "Brain Drain" research from the University of Texas at Austin. Nearly 800 smartphone users took thinking tests, and those whose phones were in another room did better than those whose phones sat on the desk, even when the phones were silent and face down. The takeaway: the phone doesn't have to buzz to cost you focus. It just has to be close.
If you rarely let your phone out of reach, Brainrot Test measures how strong that pull is and turns "phone in another room" into a daily drill: Check my brainrot.
What the study tested
The paper, "Brain Drain: The Mere Presence of One's Own Smartphone Reduces Available Cognitive Capacity," was led by Adrian Ward and published in the Journal of the Association for Consumer Research in 2017.
Here's the basic setup:
- Participants: nearly 800 smartphone users across the experiments.
- Three phone spots: on the desk (face down), in a pocket or bag, or in another room.
- The tests: tasks that measure working memory (how much you can hold in your head at once) and fluid intelligence (solving new problems).
- The rule: phones were silenced, so no calls or buzzes could interrupt.
The point was to test the "mere presence" of a phone, not notifications.
What it found
The results lined up with distance:
| Where the phone was | How people did on the tests |
|---|---|
| In another room | Best |
| In a pocket or bag | In between |
| On the desk, face down | Worst |
A few more details worth knowing:
- People didn't feel distracted. Many said they weren't thinking about their phones at all. The effect showed up in scores, not in how people felt.
- Silent or off didn't fix it. In one experiment, turning the phone off didn't make a big difference if it was still nearby.
- Heavier phone reliance, bigger effect. People who said they depended more on their phones tended to show a stronger drop.
A fair caveat
Later researchers have tried to repeat these results, and the findings have been mixed, with some studies seeing a smaller effect or none. So treat the Brain Drain study as a strong, sensible nudge, not an unbreakable law. The good news: leaving your phone in another room costs you nothing to try.
Why a silent phone still distracts
If the phone isn't making noise, why would it matter? The researchers' explanation goes like this:
- Your brain knows it's there. Your phone is tied to messages, friends, news and fun. It's one of the most important objects in your day.
- Ignoring it takes effort. Part of your brain works to not check it, even when you don't notice.
- That effort isn't free. The mental energy spent resisting the phone isn't available for the task in front of you.
That's the "brain drain." It's like trying to study with someone you really want to talk to sitting next to you. They don't have to say anything to pull at you.
Face down vs another room
A lot of people think flipping their phone face down is enough. According to this study, it's the weakest option.
Phone face down vs another room: quick comparison
- Face down on desk: out of sight of the screen, but still in arm's reach. Your brain still knows.
- In your bag: better. It takes effort to get it.
- In a different room: best. Getting it means getting up and walking away from the task, which is often enough of a pause for the urge to pass.
What about grayscale?
Another popular trick is switching your phone to grayscale so apps look less colorful and tempting. Some small studies have tested it, and people use it as part of a routine. It's a reasonable extra, but it still leaves the phone in reach. Distance does something grayscale can't.
The hard part isn't understanding the study, it's actually doing it, every day, when your phone feels like part of your hand. Brainrot Test builds it in: after your 17-question score, you get one two-minute drill a day that ends with a real-world action on a timer, like putting your phone in another room for 10 minutes. Every finished drill takes a point off your score. Check my brainrot
How to use it for studying
Here's where to put your phone while studying, and a routine to go with it:
- Before you start: answer any messages you need to, then tell friends you'll be offline for an hour.
- Move the phone: charge it in the kitchen, living room or anywhere that isn't your desk.
- Use a non-phone timer: a kitchen timer, a clock or your laptop. If your phone is your timer, it's back on your desk.
- Work in blocks: 25 to 45 minutes of focus, then a 5 to 10 minute break.
- Break rule: during breaks, you can check the phone for a few minutes, but it goes back to the other room before the next block.
Airpods and music
A common question: can you use AirPods if you leave your phone in another room? If your earbuds stay connected from a distance and it doesn't tempt you, sure. But if you keep walking back to skip songs, make a playlist long enough for the whole block before you start, or play music from a speaker or laptop instead.
Make it non-negotiable
Some people call it their "phone in another room non-negotiable." It works because you don't negotiate every day. The rule is simple: homework time = phone elsewhere.
How to use it at night
Charging your phone in another room at night might be the most powerful version of this idea.
Why sleeping with your phone in another room helps:
- No last scroll. You can't doomscroll a phone you can't reach.
- No 3 a.m. check. If you wake up, there's nothing to grab.
- Mornings start calmer. Your first few minutes aren't spent in a feed.
How to make it work:
- Get a cheap alarm clock so your phone isn't your alarm.
- Pick a charging spot outside your bedroom and plug in at the same time each night.
- Keep a book or journal by the bed for when you can't sleep.
For a full bedtime routine built around this, read how to stop doomscrolling at night. It also works for movies: see how to watch a movie without checking your phone.
Turn the research into a daily habit in the next minute
The phone in another room study gives you a simple idea: distance beats willpower. Brainrot Test shows how hooked your phone habits are with a score, tier and rank, then gives you one two-minute drill a day to build the habit. A missed day just pauses your streak, and a Sunday re-check shows how far your score has dropped.
FAQ
What did the phone in another room study find?
In the 2017 Brain Drain study at UT Austin, people with their phones in another room scored better on working memory and problem-solving tests than people with their phones on the desk. Phones in a pocket or bag landed in between.
Is leaving your phone in another room really better than face down?
In that study, yes. Face down on the desk was the worst spot. Later studies have had mixed results, but putting your phone in a different room is free and easy to try.
Is it better to charge your phone in another room at night?
For many people, yes. It removes late-night scrolling and early-morning checking. Use a regular alarm clock so you don't need your phone by the bed.
Does having your phone nearby affect focus even if it's off?
In the Brain Drain experiments, turning the phone off didn't make much difference if it was still nearby. The researchers think ignoring the phone uses up some mental effort.
What is the grayscale phone study?
Grayscale is a setting that removes color from your screen, and some small studies have looked at whether it cuts phone use. It can help a bit, but it still leaves the phone in reach, so pair it with distance.